To safeguard the ocean ecosystem,fuel cells are excellent candidates as the primary energy supply for marine vessels due to their high efficiency,low noise,and cleanliness.However,fuel cells in hybrid power systems ar...To safeguard the ocean ecosystem,fuel cells are excellent candidates as the primary energy supply for marine vessels due to their high efficiency,low noise,and cleanliness.However,fuel cells in hybrid power systems are highly susceptible to load transients,which can severely damage fuel cells and shorten their lifespan.Therefore,the formulation of energy management strategies accounting for power degradation is crucial and urgent.In this study,an improved strategy for equivalent consumption minimization strategy(ECMS)considering power degradation is proposed.The improved energy control strategy effectively controls the energy distribution of hydrogen fuel cells,lithium batteries,and supercapacitors in hybrid power ships.The proposed control strategy combines the ECMS with an adaptive filteringmethod.The main objective of the ECMS is to allocate power to the fuel cell systems and energy storage systems(ESS)to stabilize the power output of fuel cells,prolong their service life,and reduce the hydrogen consumption in fuel cells.The adaptive filteringmethod,by low-pass filtering of the energy in the energy storage system,is used to allocate power between lithium batteries and supercapacitors to minimize the effect of transient and peak energy output on the lifespan of lithium batteries.To verify the superiority of the control strategy,a mathematical model for the hybrid power system is developed.In comparison to traditional ECMS and traditional ECMS considering degradation,the improved ECMS considering power degradation shows better performance in the overall economy,the durability of fuel cells and batteries,and system dynamic performance.展开更多
基金The study was founded by the National Key R&D Program of China(2022YFB4301403).
文摘To safeguard the ocean ecosystem,fuel cells are excellent candidates as the primary energy supply for marine vessels due to their high efficiency,low noise,and cleanliness.However,fuel cells in hybrid power systems are highly susceptible to load transients,which can severely damage fuel cells and shorten their lifespan.Therefore,the formulation of energy management strategies accounting for power degradation is crucial and urgent.In this study,an improved strategy for equivalent consumption minimization strategy(ECMS)considering power degradation is proposed.The improved energy control strategy effectively controls the energy distribution of hydrogen fuel cells,lithium batteries,and supercapacitors in hybrid power ships.The proposed control strategy combines the ECMS with an adaptive filteringmethod.The main objective of the ECMS is to allocate power to the fuel cell systems and energy storage systems(ESS)to stabilize the power output of fuel cells,prolong their service life,and reduce the hydrogen consumption in fuel cells.The adaptive filteringmethod,by low-pass filtering of the energy in the energy storage system,is used to allocate power between lithium batteries and supercapacitors to minimize the effect of transient and peak energy output on the lifespan of lithium batteries.To verify the superiority of the control strategy,a mathematical model for the hybrid power system is developed.In comparison to traditional ECMS and traditional ECMS considering degradation,the improved ECMS considering power degradation shows better performance in the overall economy,the durability of fuel cells and batteries,and system dynamic performance.
